code: def test_sink_csv(io_files_path: Path, tmp_path: Path) -> None:
      source_file = io_files_path / "small.parquet"
      target_file = tmp_path / "sink.csv"
  
      pl.scan_parquet(source_file).sink_csv(target_file)
  
      with pl.StringCache():
          source_data = pl.read_parquet(source_file)
          target_data = pl.read_csv(target_file)
          assert_frame_equal(target_data, source_data)
  
file_path: polars/py-polars/tests/unit/streaming/test_streaming_io.py
imports: from __future__ import annotations
  import unittest
  from typing import TYPE_CHECKING
  import pytest
  import polars
  from polars.testing import assert_frame_equal
label_desc: Use image node_id 7 for calling a global function with example usage: test_sink_csv(io_files_path, tmp_path) without return types